ul {
    margin: 0;
    padding: 0;
    list-style: none;
}
a {
    text-decoration:none;
}
.menu-wrap {
    position: relative;
    width:200px;
    height:440px;
    background:#424242;
    margin: 50px;
}
.menu-wrap .main  {
    height: 100%;
}
.menu-wrap .main .main-item {
    height: 44px;
}
.menu-wrap .main .main-item a {
    display:block;
    height:100%;
    text-align: center;
    line-height:44px;
    color:#fff;
}
.menu-wrap .main .main-item.active a {
    background-color: #989898;
    color:orange;
}
.menu-wrap .sub{
    position: absolute;
    top:0;
    left:200px;
    width: 440px;
    height:440px;
    background:#eee;
}
.menu-wrap .sub.hide {
    display: none;
}
.menu-wrap .sub .sub-list {
    display: none;
    position: absolute;
    top:0;
    left:0;
    width: 100%;
    height:100px;
    line-height: 440px;
    text-align: center;
    font-size: 50px;
}
.menu-wrap .sub .sub-list.active {
    display: block;
}